Création de l'application Java-FX, changement du titre de la fenêtre.

chat/src/main/java/module-info.java

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+module rtgre.chat {
+    requires javafx.controls;
+    requires javafx.fxml;
+
+
+    opens rtgre.chat to javafx.fxml;
+    exports rtgre.chat;
+}

chat/src/main/java/rtgre/chat/ChatApplication.java

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+package rtgre.chat;
+
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
+public class ChatApplication extends Application {
+    @Override
+    public void start(Stage stage) throws IOException {
+        FXMLLoader fxmlLoader = new FXMLLoader(ChatApplication.class.getResource("chat-view.fxml"));
+        Scene scene = new Scene(fxmlLoader.load(), 320, 240);
+        stage.setTitle("Chat @BOUCLY_Emi (B2GA)");
+        stage.setScene(scene);
+        stage.show();
+    }
+
+    public static void main(String[] args) {
+        launch();
+    }
+}

chat/src/main/java/rtgre/chat/ChatController.java

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+package rtgre.chat;
+
+import javafx.fxml.FXML;
+import javafx.scene.control.Label;
+
+public class ChatController {
+    @FXML
+    private Label welcomeText;
+
+    @FXML
+    protected void onHelloButtonClick() {
+        welcomeText.setText("Welcome to JavaFX Application!");
+    }
+}

chat/src/main/resources/rtgre/chat/chat-view.fxml

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+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.layout.VBox?>
+
+<?import javafx.scene.control.Button?>
+<VBox alignment="CENTER" spacing="20.0" xmlns:fx="http://javafx.com/fxml"
+      fx:controller="rtgre.chat.ChatController">
+    <padding>
+        <Insets bottom="20.0" left="20.0" right="20.0" top="20.0"/>
+    </padding>
+
+    <Label fx:id="welcomeText"/>
+    <Button text="Hello!" onAction="#onHelloButtonClick"/>
+</VBox>